How to read a single character from the user? How to read a single character from the user? python python

How to read a single character from the user?


Here's a link to the ActiveState Recipes site that says how you can read a single character in Windows, Linux and OSX:

    getch()-like unbuffered character reading from stdin on both Windows and Unix

class _Getch:    """Gets a single character from standard input.  Does not echo to thescreen."""    def __init__(self):        try:            self.impl = _GetchWindows()        except ImportError:            self.impl = _GetchUnix()    def __call__(self): return self.impl()class _GetchUnix:    def __init__(self):        import tty, sys    def __call__(self):        import sys, tty, termios        fd = sys.stdin.fileno()        old_settings = termios.tcgetattr(fd)        try:            tty.setraw(sys.stdin.fileno())            ch = sys.stdin.read(1)        finally:            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)        return chclass _GetchWindows:    def __init__(self):        import msvcrt    def __call__(self):        import msvcrt        return msvcrt.getch()getch = _Getch()


sys.stdin.read(1)

will basically read 1 byte from STDIN.

If you must use the method which does not wait for the \n you can use this code as suggested in previous answer:

class _Getch:    """Gets a single character from standard input.  Does not echo to the screen."""    def __init__(self):        try:            self.impl = _GetchWindows()        except ImportError:            self.impl = _GetchUnix()    def __call__(self): return self.impl()class _GetchUnix:    def __init__(self):        import tty, sys    def __call__(self):        import sys, tty, termios        fd = sys.stdin.fileno()        old_settings = termios.tcgetattr(fd)        try:            tty.setraw(sys.stdin.fileno())            ch = sys.stdin.read(1)        finally:            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)        return chclass _GetchWindows:    def __init__(self):        import msvcrt    def __call__(self):        import msvcrt        return msvcrt.getch()getch = _Getch()

(taken from http://code.activestate.com/recipes/134892/)


The ActiveState recipe quoted verbatim in two answers is over-engineered. It can be boiled down to this:

def _find_getch():    try:        import termios    except ImportError:        # Non-POSIX. Return msvcrt's (Windows') getch.        import msvcrt        return msvcrt.getch    # POSIX system. Create and return a getch that manipulates the tty.    import sys, tty    def _getch():        fd = sys.stdin.fileno()        old_settings = termios.tcgetattr(fd)        try:            tty.setraw(fd)            ch = sys.stdin.read(1)        finally:            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)        return ch    return _getchgetch = _find_getch()


matomo